<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        body{
            margin: 0;
        }
        /*块元素特征
        1.块元素在父元素中会独占一行，后面出现的同级元素会在下一行出现
        2.块元素具备盒子模型的所以功能*/
        .box{
            height: 30px;
            background-color: red;
            margin-top: 30px;
        }
    </style>
</head>
<body>
    <ul>
        <li>
            <a href="##">首页</a>
        </li>
        <li>
            <a href="##">新闻</a>
        </li>
        <li>
            <a href="##">公司介绍</a>
        </li>
    </ul>
    <div class="box"></div>
    <div class="box"></div>
    <div class="box"></div>
    <div class="box"></div>
    <div class="box"></div>
    <div>
        <a href="##">超链接1</a>
        <a href="##">超链接2</a>

    </div>
</body>
</html>